Ammo comes in two flavors, F21 and F22, you can find out about therm by doing a search or by browsing through the mens section or by posting a question.
Instant Shine, Honesty and Openness come in neroli by default, neroli is a unisex citrusy fragrance that is fine on its own but also easy to cover.
These products are made to be used both alone or layered with other products. As I said earlier, the best thing to do is test each on its own, using this method How To Find Your Sweet Spot (How to find your sweet spot...) and once you are familiar with how much of each you need to get the best effect, as wellas what the effects look and feel like, then you can combine.